Jamie wants to send a confidential file to her friend Alice. For this purpose, they installed an application for securely sharing the file. The application employs an encryption algorithm that uses th

The correct answer is A. Symmetric cryptography. Symmetric cryptography (A) is correct because the defining characteristic is a single shared secret key used for both encryption and decryption - exactly what the application uses. Public-key cryptography (B) and asymmetric cryptography (D) are actually the same concept and are b

Network Security Fundamentals

Question

Jamie wants to send a confidential file to her friend Alice. For this purpose, they installed an application for securely sharing the file. The application employs an encryption algorithm that uses the same shared secret key for encryption and decryption of data. Identify the type of cryptography employed by the application used by Alice and Jamie for file sharing.

Options

ASymmetric cryptography
BPublic-key cryptography
CRSA cryptosystem
DAsymmetric cryptography

How the community answered

(43 responses)

A
88% (38)
B
2% (1)
C
7% (3)
D
2% (1)

Explanation

Symmetric cryptography (A) is correct because the defining characteristic is a single shared secret key used for both encryption and decryption - exactly what the application uses. Public-key cryptography (B) and asymmetric cryptography (D) are actually the same concept and are both wrong for the opposite reason: they use a key pair (public key to encrypt, private key to decrypt), never the same key for both operations. RSA (C) is wrong because it's a specific algorithm that implements asymmetric cryptography, not the type of system described here.

Memory tip: Think "Symmetric = Same key" - both words start with S, and symmetric means both parties share one identical key.

Topics

#symmetric cryptography#shared secret key#encryption algorithms#key management

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